TOKYO, April 5 (Reuters) - Yields on benchmark 10-year Japanese government bonds rebounded sharply from record lows on Friday as investors locked in gains a day after the Bank of Japan unveiled sweeping monetary stimulus to revive the economy.

The 10-year yield climbed 18 basis points to 0.615 percent in the afternoon session after dropping as much as 12 basis points in the morning to a record low of 0.315 percent.

Ten-year JGB futures dropped 2.49 points to 143.55 on the day to a near two-month low. They hit a record high of 146.41 in morning trade.